<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
</head>
<body>
  <button>fetch发送ajax请求</button>
</body>
<script>
  const btn = document.querySelector('button')
  btn.onclick = function(){
    fetch('http://127.0.0.1:8000/fetch-server', {
      // 请求类型
      method: 'POST',
      // 请求头
      headers: {
        name: 'abc'
      },
      // 请求体
      body: 'username=admin&password=admin'
    }).then(res => {
      // console.log(res)
      return res.json()
    }).then(res => {
      console.log(res)
    })
  }
</script>
</html>